전자기 이미지에 의한 철도 차륜 표면의 손상 평가

초록

The surface of railway wheels running on rails is subject to damage due to rail and frictional wear, damage from wheeltread and flange wear caused by curved track operations, and damage from flats and concave wear due to braking frictionheat from brake shoes. Although the surface of wheels is regularly reprofiled through periodic grinding cycles, damageoccurring to the wheel surface during operation can lead to deteriorated ride quality and potential failure due to crackpropagation. In domestic railway components technical standards, wheel integrity is mandated to be demonstrated throughnon-destructive testing. To prevent and detect failures caused by damage occurring on railway wheels, it is necessary todevelop methods that could detect and evaluate surface damage. The present study investigated a method for detectingand evaluating surface damage on railway wheels using electromagnetic imaging. Results demonstrated that defects with alength of 10 mm, a width of 0.8 to 1.0 mm, and a depth of 0.2 to 1.0 mm could be adequately detected usingelectromagnetic scan images.

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